Die set



W. KlWl DIE SET March 21, 1939;

Filed Sept. 14, 1937 dag/ 3022 m mm; n 8 [w an W j Patented Mar. 21,1939 UNITED STATES PATENT OFFICE I 2.15 1419 Appflmtizz s iitefirertrzzifz rial zo. 163,722 60lalms. (Cl.164-118) My inventionrelates to improvements in die sets, comprising punch and die members,for use with punch presses'and automatic machines.

The object of my invention is to provide means for readily mounting andremoving they die sets from the die standards, or shoes, now in generaluse.

Heretofore it has been necessary to remove the shoes from the press whenit was desired to mount the die sets upon' the shoes, or for changingthe die sets for different sizes or shapes. The mounting of the die setsrequired the services of skilled die setters, as the die members wererequired to be accurately located upon the shoes for proper alignment.My invention eliminates the services of skilled die setters.

A further object is to provide guide plates upon the shoes for receivingdifferent die sets, all of whichare' of uniform size and adapted tooccupy said guide plates by sliding the die sets into the same, withoutchanging the position of the guide plates upon the shoes.

A further object is to provide the die members with guide or dowel pinsfor forming the members .into a unit, with one member movable to andfrom the other upon said pins.

A further object is to arrange the dowel pins upon the die members toform guides adapted for guiding a strip of material between said pinsand into a position to be operated upon by the die members.

These together with various other novel features of construction andarrangement of the parts, which will be more fullyhereinafter describedand claimed, constitute my invention.

Referring to the accompanying drawing:

Fig. 1 is a front elevation of a portion of a press having standards, orshoes,- and embodying my novel die set and the mountings for the latter.

Fig. 2 is a transverse vertical section on line 2-2 Fig. 1.

Fig. 3 is a horizontal section on line 38 Fig.

Fig. 4 is a perspective view of the die unit deshoes are arranged withtheir faces l2 and II extending parallel to each other and are movableto and from each other by the head 6, in the usual manner.

Guide plates 5 and I6, forming a pair are secured to said face l2 of theshoe 1, and similar 5 plates l1 and I8 are secured to said face l3 ofthe shoe 8, by means of fastening devices IS.

A die set, comprising the female die member 20, and the punch member 2|,are formed into a portable unit by means of guide or dowel-pins 10 22,23, 24 and 25. Said pins are secured in the members 20 and are slidablymounted upon the opposite member 2|. The pins 22 to 25 form means forslidably mounting a stripper plate 26, and also a block of rubber 21 formoving the stripper plate relatively to the punch member.

The guide plates I5 to l8 have tongues 30, which form guides extendingparallel with said faces |2 and.|3 of the shoes. The die members and 2|are provided with grooves 3|, as shown 20 in Fig. 4, to receive thetongues 30.

The die members 20 and 2| each have a sliding fit upon the guide platesand the tongues 30, whereby the die unit may be readily inserted andremoved from the guide plates and from the press. A stop plate 33 shownin Figs. 2'and 3, is secured upon the lower shoe 1 for limiting therearward movement of the die unit relatively to the shoes. No otherfastening means is required for securing the die set or unit upon theshoes.

Each set of die members is made for punching an article of a definiteshape or size, from a strip of material 35, having a standard width. Thedowel pins 22 to 25 are mounted directly upon the plates forming the diemembers, and said pins are symmetrically arranged upon said platesrelatively to the normal center of the cutting action of the diemembers, whereby the dowel pins form guides for the strip 35. Said pins22 and 23 are arranged to form a pair, and the pins 24 and 25 formanother pair, so that the strip 35 will be guided by each pair of pinsas shown in Fig. 3. Heretofore the pins for guiding the strip ofmaterial to the die set were mounted upon the shoes and not upon the diemembers, and required accurate adjustment relatively to the die set. Bymounting the pins' 22 to 25 directly upon the die members they arealways in the proper position for guiding the strip 35 relatively to thedie set.

The operation of my invention is as follows: all the die members of aseries for making a run of parts to be punched are of uniform size andadapted to fit between the guide plates attached to the shoe set, sothat the die sets can be readily inserted and removed from the guideplates and from the press without the aid of skilled labor, and withoutremoving the shoes from; the press, which latteroperation required thepress to be first disconnected from-the source of power for operatingthe press.

Die sets of other sizes can be used by changing the position of theguide plates upon the shoes by providing the'latter with diiferentlylocated holes for receiving the fastening devices l9, thus avoiding thenecessity of removing the shoes from for slidably mounting said diemembers upon theshoe members for movement in a plane parallel with saidfaces.

2. In combination, cooperating shoe members adapted for mounting in apunch press, said members having parallel faces movable to and fromeachother, a pair of cooperating die members, means connecting said diemembers for movement relatively to each other and forming said diemembers into a portable unit, a pair of guide plates mounted upon eachof said faces of the shoe members and arranged to embrace :a die memberbetween each pair of said guide plates, and cooperating guide means uponsaid guide plates and the die members arranged for slidably mounting thedie unit for movement in a plane parallel with said faces.

3. In combination, cooperating shoe members adapted for mounting in apunch press, said members having parallel faces movable to and from eachother, a pair or cooperating die members, means operatively connectingsaid die members and forming the latter into a portable unit, a pair ofguide plates secured to each or said races and arranged to embrace a diemember bepins symmetrically arranged to form guides for arcane tween apair of guide plates, a guide tongue upon each guide plate and extendingparallel with said faces, and said die members having grooves rormedtherein adapted to be occupied by said tongues ror slidably mounting thedie members 5 I for movement in a plane parallel with said faces.

4. In combination, a punch press having members with parallel facesmovable to and from each-other, a pair of cooperating die members, meansconnecting said die members for movement to and from each other andforming said die members into a portable unit, a pair of guide platesmounted upon each of said faces, cooperating guide means upon said guideplates and the die members arranged for slidably mounting the die unitfor movement in a plane parallel with said faces, and a stop platesecured to one of said faces and arranged for limiting the movement ofthe die unit in one direction relatively to the guide plates.

5. In combination, a punch press having members with parallel facesmovable to and from each other, a pair of cooperating die members, pinsconnecting said die members for movement races arranged for slidablymounting the die members for movement in a plane parallel with saidfaces, and said pins symmetrically arranged relatively to the normalcenter of the cuttizg action of the die members to form guides Ior 40recting a strip of material between said pins to be operated upon bysaid die members.

6. In combination, cooperating shoe members adapted for mounting in apunch press, said members having parallel faces movable to and as fromeach other, a pair oi cooperating die mem bers, pins secured upon one ofsaid die members and slidably mounted upon the opposite die member andforming'the die members into a portable unit, guide plates, meanssecuring the guide plates 40 upon the shoe members, said guide platesarranged ior slidably mounting the die unit for movement parallel withsaid faces, a stripper plate slidably mounted upon said pins, and saiddirecting a strip of material between the pins to be operated upon bythe die members.

WALTER KIWI.

